* {
  margin: 0;
  padding: 0;
}
ul,
li {
  list-style: none;
}
img {
  display: block;
}
html,
body {
  height: 100%;
}
.clearfix:after {
  content: "";
  display: block;
  clear: both;
}

#main {
  height: 100%;
  display: flex;
  flex-direction: column;
}
#content {
  flex: 1;
  overflow: auto;
  margin-bottom: 50px;
  position: relative;
  display: flex;
  flex-direction: column;
}
